You can edit the code directly in Bitrig, but we haven't optimized the experience around that.

Are you imagining you'd be editing the code with the software keyboard or a paired hardware keyboard?

I'm imagining quick prototyping (including on-device, offline execution) of small pieces of code (potentially growing into a small app) with the software keyboard, like in Pythonista or Pyto.

My workflow often goes like this: got an idea, let me quickly test it on the go, like while walking down the street, working on unrelated stuff or just chilling. Open up Pythonista, write some code, run it, tweak it, etc. If a piece of code becomes important enough, I copy it to the computer and continue working on it there.